Income Taxes - Schedule of Tax Effects of Significant Temporary Differences Comprising Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Intangible assets and goodwill	$ 2,931	$ 4,067
Inventories and related reserves	17,640	19,525
Deferred revenue and cost of goods sold	11,189	10,826
Other accruals and reserves	7,729	5,371
Accrued compensation	2,964	5,004
Allowance for doubtful accounts	2,863	2,094
Accrued interest	17,300	17,555
Net operating loss carryforwards	38,010	34,514
Other, net	4,441	1,202
Total	105,067	100,158
Valuation allowance	(43,340)	(37,438)
Deferred tax asset	61,727	62,720
Withholding taxes	253	229
Property, plant and equipment	(4,168)	(6,766)
Deferred tax liability	4,421	6,995
Net deferred tax assets	$ 57,306	$ 55,725